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I recently tried to install NotEnoughItems with Terrafirmacraft, and it didn't work, so I decided to delete .minecraft and start anew. This time I tried to install NotEnoughItems before Terrafiramcraft. I downloaded Codechickencore, Minecraft Forge, and installed those. I tried launching Minecraft with only those installed, and after I hit "play" on the launcher, Minecraft wouldn't even start up. Just, hit "play" and nothing happened, it wasn't crashing because crashing implies the game started.. So I checked my Java, everything was okay there. I reinstalled Codechickencore, and now Minecraft opens. Then I tried to install NotEnoughItems. It crashed on startup. I reinstalled everything, and it just crashes on startup. Here's the error report:

---- Minecraft Crash Report ----
// I feel sad now

Time: 10/9/14 2:18 PM
Description: Unexpected error

java.lang.ExceptionInInitializerError
at codechicken.nei.ClientHandler.tickEvent(ClientHandler.java:160)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_7_ClientHandler_tickEvent_RenderTickEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:139)
at cpw.mods.fml.common.FMLCommonHandler.onRenderTickEnd(FMLCommonHandler.java:340)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:992)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:887)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.RuntimeException: java.io.FileNotFoundException: C:\Users\CornlordofPilaggis\AppData\Roaming\.minecraft\config\NEI\client.cfg (The requested operation cannot be performed on a file with a user-mapped section open)
at codechicken.lib.config.ConfigFile.saveConfig(ConfigFile.java:98)
at codechicken.lib.config.ConfigTagParent.setNewLineMode(ConfigTagParent.java:90)
at codechicken.nei.NEIClientConfig.setDefaults(NEIClientConfig.java:63)
at codechicken.nei.NEIClientConfig.<clinit>(NEIClientConfig.java:55)
... 14 more
Caused by: java.io.FileNotFoundException: C:\Users\CornlordofPilaggis\AppData\Roaming\.minecraft\config\NEI\client.cfg (The requested operation cannot be performed on a file with a user-mapped section open)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.PrintWriter.<init>(Unknown Source)
at codechicken.lib.config.ConfigFile.saveConfig(ConfigFile.java:96)
... 17 more


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.7.0_67, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 340020360 bytes (324 MB) / 522715136 bytes (498 MB) up to 17166499840 bytes (16371 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx16G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.05 FML v7.10.84.1217 Minecraft Forge 10.13.1.1217 5 mods loaded, 5 mods active
mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
FML{7.10.84.1217} [Forge Mod Loader] (forge-1.7.10-10.13.1.1217.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Forge{10.13.1.1217} [Minecraft Forge] (forge-1.7.10-10.13.1.1217.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
CodeChickenCore{1.0.2.9} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
NotEnoughItems{1.0.2.15} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.2.15-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Launched Version: 1.7.10-Forge10.13.1.1217
LWJGL: 2.9.1
OpenGL: GeForce GTX 760/PCIe/SSE2 GL version 4.4.0, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)

same problem but i dont have an antivirus on my mac

I got the same with forge on 1.7.2

Who knows how to fix it?

Fix what? You keep hijacking other threads without contributing any of your own info. Look at what the original poster submitted. Where is your info?